Clear() freezes MCU for ~10ms

[AndrejValand]

clear() function locks up the MCU for about 10ms as its waiting for synchronisation. For a fast running main loop i propose replacing the while(WDT->STATUS.bit.SYNCBUSY); loop with

void WDTZero::clearinloop() {
if((WDT->STATUS.bit.SYNCBUSY)==0){
WDT->CLEAR.reg = WDT_CLEAR_CLEAR_KEY; // Clear WTD bit
WDTZeroCounter = _ewtcounter; // Reset the early warning downcounter value
}
}

Or some other solution that would work in loop as also outside the loop and would not lock up the MCU